Description
In the Linux kernel, the following vulnerability has been resolved:
fou: remove warn in gue_gro_receive on unsupported protocol
Drop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is
not known or does not have a GRO handler.
Such a packet is easily constructed. Syzbot generates them and sets
off this warning.
Remove the warning as it is expected and not actionable.
The warning was previously reduced from WARN_ON to WARN_ON_ONCE in
commit 270136613bf7 ("fou: Do WARN_ON_ONCE in gue_gro_receive for bad
proto callbacks").
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 3.18 | 5.10.234 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.10.6-1 | — |
| Debian 13 | linux | 6.10.6-1 | — |
| Debian 12 | linux | 6.1.112-1 | DSA-5782-1 |
| Debian 11 | linux | 5.10.234-1 | DLA-4075-1 |
| Debian 11 | linux-6.1 | 6.1.119-1~deb11u1 | DLA-4008-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1057.59 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-50.51 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1020.22 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1020.23 | USN-7196-1 |
| Ubuntu 24.04 LTS | linux-gcp +1 | 6.8.0-1019.21 | USN-7155-1, USN-7154-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1015.19 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1002.4 | USN-7156-1 |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1017.17 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1019.21.1 | USN-7155-1 |
| Ubuntu 24.04 LTS | linux-oem-6.8 | 6.8.0-1018.18 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-oracle +1 | 6.8.0-1017.18 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1016.18 | USN-7154-1 |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-50.51.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-127.137 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1073.79 | USN-7166-2 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1020.22~22.04.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1078.87 | USN-7186-2 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1020.23~22.04.1 | USN-7196-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1078.87.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1072.80 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 +1 | 6.8.0-1019.21~22.04.1 | USN-7155-1, USN-7154-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1070.76 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1056.63 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-50.51~22.04.1 | USN-7154-2 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1066.69 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1017.17~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1070.75 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1068.69 | USN-7166-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1032.32 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1020.20 | — |
| Ubuntu 22.04 LTS | linux-oracle +1 | 5.15.0-1071.77 | USN-7186-1, USN-7166-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1017.18~22.04.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 +1 | 6.8.0-50.51.1~22.04.1 | USN-7154-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1039.43 | USN-7166-4 |
| Ubuntu 20.04 LTS | linux | 5.4.0-202.222 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1136.146 | USN-7159-2 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1073.79~20.04.1 | USN-7166-2 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1142.149 | USN-7195-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1078.87~20.04.1 | USN-7194-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1096.103 | USN-7159-3 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1140.149 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1072.80~20.04.1 | USN-7166-1 |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-127.137~20.04.1 | USN-7166-3, USN-7166-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1083.88 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1066.69~20.04.1 | USN-7166-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1045.46 | USN-7159-4 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1124.132 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1032.32~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1135.144 | USN-7159-3 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 +1 | 5.15.0-1071.77~20.04.1 | USN-7186-2, USN-7166-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1120.132 | USN-7159-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1069.73~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1055.59 | USN-7159-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2015.16 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1013.14 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1066.68 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1074.82 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1013.14~22.04.1 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-78.78+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1073.79+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1078.87+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-127.137+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1072.80+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1136.146+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1142.149+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1110.120 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1140.149+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2112.118 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2091.97 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1128.139 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2075.80 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1106.113 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-230.242 | USN-7069-1 |
| Ubuntu Pro 18.04 LTS | linux-aws | 4.15.0-1174.187 | USN-7069-1 |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1136.146~18.04.1 | USN-7159-2 |
| Ubuntu Pro 18.04 LTS | linux-azure-4.15 | 4.15.0-1182.197 | USN-7069-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1142.149~18.04.1 | USN-7195-2 |
| Ubuntu Pro 18.04 LTS | linux-gcp-4.15 | 4.15.0-1167.184 | USN-7069-1 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1140.149~18.04.1 | USN-7159-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-202.222~18.04.1 | USN-7159-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1083.88~18.04.1 | USN-7159-1 |
| Ubuntu Pro 18.04 LTS | linux-kvm | 4.15.0-1157.162 | USN-7069-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle | 4.15.0-1136.147 | USN-7069-1 |
| Ubuntu Pro 18.04 LTS | linux-oracle-5.4 | 5.4.0-1135.144~18.04.1 | USN-7159-3 |
| Ubuntu Pro 18.04 LTS | linux-raspi-5.4 | 5.4.0-1120.132~18.04.1 | USN-7159-5 |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-260.294 | USN-7110-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1175.190 | USN-7110-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1174.187~16.04.1 | USN-7069-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1182.197~16.04.1 | USN-7069-2 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1167.184~16.04.2 | USN-7069-1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-230.242~16.04.1 | USN-7069-1 |
| Ubuntu Pro 16.04 LTS | linux-kvm | 4.4.0-1138.148 | USN-7110-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1136.147~16.04.1 | USN-7069-1 |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1137.143 | USN-7110-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1182.197~14.04.1 | USN-7069-2 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-260.294~14.04.1 | USN-7110-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.176.3-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bpftool +13 | 5.15.0-305.176.4.el9uek | ELSA-2025-20095 |
Advisories 27
- USN-7166-1 linux, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7154-1 linux, linux-aws, linux-aws-6.8, linux-gcp, linux-gcp-6.8, linux-gke, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oem-6.8, linux-oracle, linux-oracle-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7166-3 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7195-2 linux-azure-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-3 linux-bluefield, linux-oracle, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7155-1 linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7186-2 linux-azure, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7166-2 linux-aws, linux-aws-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7194-1 linux-azure-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7196-1 linux-azure, linux-azure-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7069-1 linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7156-1 linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7186-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-1 linux, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-raspi, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7166-4 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7154-2 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7110-1 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-5 linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7195-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-2 linux-aws, linux-aws-5.4 vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7069-2 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- USN-7159-4 linux-iot vulnerabilities Ubuntu Security Notices (USN) · Oct 29, 2026
- DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5782-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4075-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2024-1927 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 16, 2026
- ELSA-2025-20095 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 9, 2025
References
- https://git.kernel.org/stable/c/a925a200299a6dfc7c172f54da6f374edc930053
- https://git.kernel.org/stable/c/b1453a5616c7bd8acd90633ceba4e59105ba3b51
- https://git.kernel.org/stable/c/5a2e37bc648a2503bf6d687aed27b9f4455d82eb
- https://git.kernel.org/stable/c/3db4395332e7050ef9ddeb3052e6b5019f2a2a59
- https://git.kernel.org/stable/c/440ab7f97261bc28501636a13998e1b1946d2e79
- https://git.kernel.org/stable/c/dd89a81d850fa9a65f67b4527c0e420d15bf836c